JP2590427Y2 - Connection structure between flexible board and reinforcing plate - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a flexible board and a reinforcing plate, and more particularly to a circuit pattern mounted on an outer surface of a casing of a combination meter of an automobile, for driving an instrument in the casing and for a lighting bulb. The present invention relates to a connection structure between a flexible board and a reinforcing board when a reinforcing board is mounted on a flexible printed board (hereinafter, simply referred to as a flexible board) on which electronic components are mounted.

[0002]

2. Description of the Related Art Generally, a wiring for driving an instrument in a meter is provided on an outer surface of a casing (meter case) of an instrument panel on which various instruments (meters), warning lights, and the like are mounted, such as a combination meter of an automobile. And a circuit board are provided. Conventionally, this circuit board was a solid plate-like solid board made of phenolic resin, etc.
In many cases, a flexible substrate that is flexible and can be bent freely is used.

On the other hand, electronic circuit components such as an LED (light emitting diode) for emitting light in the meter case, a connector, and the like must be mounted on the flexible substrate mounted on the back surface of the meter case. In such a case, a reinforcing plate is attached to the flexible substrate.

FIG. 4 shows the reinforcing plate 2 on the back of the meter case 30.
FIG. 3 is an assembly perspective view showing a configuration of a combination meter 40 in a case where 0 and a flexible substrate 10 are provided. As shown in FIG. 4, on the back of the meter case 30,
A valve mounting hole 31 for mounting the bulb 1 for illuminating the inside of the meter case 30 is provided at a predetermined position. A connector groove 32 for mounting a connector (not shown) for exchanging signals and power with the flexible substrate 10 is provided on the back surface of the meter case 30. Further, a plurality of light source insertion holes 33 for inserting a light source for turning on a warning lamp (warning lamp) built in the combination meter 40 are provided in a lower rear portion of the meter case 30. Furthermore, meter case 3
On the back surface of 0, there is provided a concave portion 34 for allowing a protrusion of a connector pin to be described later to escape.

In this example, an LED 3 is inserted into a light source insertion hole 33 provided on the back surface of the meter case 30, and this LED 3 is connected to the flexible substrate 10 via a reinforcing plate 20. It has become. For this reason, the LED mounting hole 23 is provided at a portion of the reinforcing plate 20 corresponding to the light source insertion hole 33 provided on the back surface of the meter case 30.
Are provided at a plurality of locations. Also, the reinforcing plate 2 of this example
0 is provided with a connector pin mounting hole 24 for mounting a male connector pin 4 connected to a female connector mounted on the flexible board 10. This connector pin 4
Has a head 4a. When the head 4a is attached to the reinforcing plate 20, the head 4a projects toward the meter case 30 side.
A recess 34 is provided on the back of the meter case 30 so that the head 4a does not contact the meter case 30.

On the other hand, the flexible board 10 mounted on the back of the meter case 30 with the reinforcing plate 20 interposed therebetween is provided with a valve mounting hole 11 at a position overlapping the valve mounting hole 31 of the meter case 30. A circuit pattern (not shown) for supplying power to a power supply terminal provided on the bulb 1 is provided around the mounting hole 11. Each circuit pattern is guided to a terminal portion 12 provided on a peripheral portion of the flexible substrate 10. Notches 12 a are provided at both ends of each terminal portion 12, and the terminal portions 12 correspond to portions of a connector groove 32 provided on the back surface of the meter case 30. The terminal portion 12 is bent into the connector groove 32 by a connector (not shown) inserted into the connector groove 32 in a state where the flexible substrate 10 is attached to the back surface of the meter case 30, and is formed on a side surface of the connector. The circuit pattern provided on the terminal section 12 is connected to the provided circuit terminal.

Further, the two legs 3 of the LED 3 attached to the flexible substrate 10 through the reinforcing plate 20 are provided.
a, and a circuit pattern (not shown) for soldering the legs 3a and the mounting holes 13 for inserting the male connector pins 4 which are also mounted through the reinforcing plate 20. And a circuit pattern (not shown) for soldering the male connector pins 4.

The flexible substrate 10 to which the reinforcing plate 20 has been attached in this manner is attached and fixed by the screws 2 and the like after being superposed on the back surface of the meter case 30.

[0009]

However, in the conventional connection structure between the flexible board and the reinforcing plate configured as described above, the reinforcing plate 20 is disposed on the back of the meter case 30 as shown in FIG. And the flexible substrate 10 are overlapped and attached by a double-sided tape, an adhesive, or the like, so that the flexible substrate 10 comes into contact with the sharp corner of the reinforcing plate 20 at the portion A indicated by the dashed line. The flexible substrate 10 may be extended or a crack B may be generated in the flexible substrate 10 due to vibration or the like as shown in FIG. 5B, and in the worst case, a hole may be formed. When a crack is generated or a circuit pattern runs on a portion of the flexible substrate 10 where a hole is formed,
There is a problem that the meter in the combination meter 40 may have a poor conduction. Further, when the flexible substrate 10 has a crack at one place, the crack is easily spread, so that the damage is further increased.

In view of the above, the present invention provides a method of mounting a flexible board having a reinforcing plate so as to sandwich the flexible board on the rear side of the meter case, the flexible board being damaged due to the reinforcing board due to the assembling or aging. It is an object of the present invention to provide a connection structure between a flexible board and a reinforcing plate, which can prevent the occurrence of a problem and improve the reliability.

[0011]

Means for Solving the Problems The present invention to achieve the above object, the flexible substrate attached to the casing, provided so as to be superimposed on the flexible substrate
Is, a connection structure between the reinforcing plate you reinforce the flexible substrate against the corner where the two edges butted of the reinforcing plate
A hole for receiving the corner is provided in a corresponding portion of the flexible substrate.

[0012]

According to the present invention, when attaching a flexible board superimposed on a reinforcing plate to a meter case, a hole for receiving the corner is provided in a portion of the flexible board corresponding to the corner of the reinforcing plate. The corner of the plate will pass through this hole, and the two edges will meet
Corners became does not contact the flexible substrate. As a result, the flexible board is prevented from being damaged by the corners of the reinforcing plate.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a connection structure between a flexible substrate and a reinforcing plate according to an embodiment of the present invention.
FIG. 4 is an assembly perspective view showing the configuration of the combination meter 40 when 0 is provided. Here, the same components as those of the conventional combination meter 40 described with reference to FIG.

The combination meter 40 of this embodiment
In FIG. 1, as shown in FIG. 1, the configuration of the meter case 30 is not different from the configuration of the conventional meter case 30 shown in FIG. Therefore, on the rear surface of the meter case 30, a bulb mounting hole 31 for mounting the bulb 1 for internal illumination of the meter case 30 is provided at a predetermined position, and the flexible substrate 10 is provided.
Connector (not shown) for sending and receiving signals and power
A plurality of light source insertion holes 33 for inserting a light source for turning on a warning lamp (warning lamp) built in the combination meter 40 are provided in the lower portion of the rear surface of the meter case 30. Have been. Further, a concave portion 34 is provided on the rear surface of the meter case 30 to escape a protrusion of a connector pin described later.

The LED 3 is inserted into the light source insertion hole 33 provided on the back surface of the meter case 30 in this embodiment, and this LED 3 is connected to the flexible substrate 10 via the reinforcing plate 20. It has become.
For this reason, LED mounting holes 23 are provided at a plurality of locations on the portion of the reinforcing plate 20 corresponding to the light source insertion holes 33 provided on the back surface of the meter case 30. Further, the reinforcing plate 20 of this embodiment is provided with a connector pin mounting hole 24 for mounting the male connector pin 4 connected to the female connector mounted on the flexible board 10. The connector pin 4 has a head 4a. When the connector pin 4 is attached to the reinforcing plate 20, the head 4a protrudes toward the meter case 30. The meter case 3 corresponding to the protruding head 4a
A concave portion 34 is provided in a portion on the back side of the reference numeral 0.

On the other hand, the flexible board 10 on which the reinforcing plate 20 is mounted inside and which is mounted on the back of the meter case 30 has a valve mounting hole 3 of the meter case 30.
A valve mounting hole 11 is provided in a portion overlapping 1
A circuit pattern (not shown) for supplying power to a power supply terminal provided on the bulb 1 is provided around the bulb mounting hole 11. Each circuit pattern is guided to a terminal portion 12 provided on a peripheral portion of the flexible substrate 10. Notches 12a at both ends of each terminal section 12
The terminal portion 12 corresponds to a portion of the connector groove 32 provided on the back surface of the meter case 30. The terminal portion 12 is bent into the connector groove 32 by a connector (not shown) inserted into the connector groove 32 in a state where the flexible substrate 10 is attached to the back surface of the meter case 30, and is formed on a side surface of the connector. The circuit pattern provided on the terminal section 12 is connected to the provided circuit terminal.

Further, the two legs 3 of the LED 3 attached to the flexible substrate 10 through the reinforcing plate 20 are provided.
a, and a circuit pattern (not shown) for soldering the legs 3a and the mounting holes 13 for inserting the male connector pins 4 which are also mounted through the reinforcing plate 20. And a circuit pattern (not shown) for soldering the male connector pins 4.

In addition to these structures, in this embodiment, two edges of the reinforcing plate 20 to be superimposed on the flexible substrate 10 are provided.
Each corner portion 20A which is butted, 20B, 20C, 20D, 2
The corners 20A, 20B, 20C, 20D, 20 are provided on the portions of the flexible substrate 10 corresponding to 0E and 20F.
Holes 10A, 10B, 10 for receiving E, 20F
C, 10D, 10E, and 10F are provided. In this embodiment, the holes 10B, 10C, 10D, and 10E are circular holes, and the holes 10A and 10F are semicircular holes. In addition, such holes 10A, 10B, 10C, 10D, 10E,
In the flexible board 10 provided with 10F, the circuit pattern is arranged avoiding the holes 10A to 10F. Further, the corners 20A, 20B, 20C, 20D,
20E and 20F, as shown in FIGS. 1 and 2 (b),
The side of the reinforcing plate 20 on which the flexible substrate 10 overlaps
It can be said that the two edges of
In addition, the flexible substrate 10 in the reinforcing plate 20 is heavy.
And two adjacent side surfaces of the reinforcing plate 20
It can also be said that it is a part where the elements gather and project.

The holes 10A, 10B, 10
When the reinforcing plate 20 is attached to the flexible substrate 10 provided with C, 10D, 10E, and 10F, and the flexible substrate 10 is attached and fixed to the back surface of the meter case 30 with the reinforcing plate 20 interposed therebetween by screws 2 or the like (FIG. 2). a) That is, the corners 20A to 20F of the reinforcing plate 20
Are all holes 10A, 1 provided in the flexible substrate 10.
0B, 10C, 10D, 10E, and 10F.

The hole 10A of the flexible substrate 10
As shown in the cross-sectional view of FIG.
Since the sharp corners 20A to 20F of the reinforcing plate 20 pass through the holes 10A to 10F of the flexible substrate 10 and protrude to the rear side of the flexible substrate 10, the sharp corners 20A to 20F of the reinforcing plate 20 Will not be in contact with

In addition, a hole 10A is formed in the flexible substrate 10.
When 10 to 10F are provided, the corner portions 20A to 20F of the reinforcing plate 20 are provided.
The flexible substrate 10 in the area around it becomes durable because it disperses stress, and when the flexible substrate 10 is slightly bent when it is assembled or removed, it is somewhat durable, making assembly and removal easier. Become.

As a result, the sharp corners 20A of the reinforcing plate 20 are formed.
This eliminates the possibility that the flexible board 10 may be extended due to the contact of the flexible board 10 with the flexible board 10 to 20F, or that the flexible board 10 may be cracked due to vibration or the like. No longer.

In the embodiment shown in FIGS. 1 and 2, the holes 10A to 10F provided in the flexible substrate 10 corresponding to the corners 20A to 20F of the reinforcing plate 20 are circular holes or semicircular holes. However, the shapes of the holes 10A to 10F are not limited to circular holes, and for example, the shapes of the holes 10A to 10F may be triangular as shown in FIG.
Further, as shown in FIG. 3B, the shape of the holes 10A to 10F may be L-shaped.

[0025]

[Effects of the Invention] As described above, according to the present invention,
The meter case, even when the attachment of the flexible substrate overlapping the reinforcing plate, the corner portion of the reinforcing plate does not contact directly the flexible substrate, the time and aging assembled, sharp by two edges butted Thus, it is possible to prevent the flexible board from being damaged due to the corners of the reinforcing plate, thereby improving the reliability.

[Brief description of the drawings]

FIG. 1 is an assembled perspective view showing a configuration of an embodiment of a connection structure between a flexible substrate and a reinforcing plate of the present invention.

2A is a rear view of the meter case of FIG. 1 in which a reinforcing plate and a flexible board are attached, as viewed from the back of the meter case, and FIG. 2B is a corner of the reinforcing plate of FIG. 3 is a partially enlarged cross-sectional view showing a part of FIG.

FIG. 3 (a) is a rear view showing the configuration of another embodiment of the flexible substrate used in the present invention, and FIG. 3 (b) shows the configuration of still another embodiment of the flexible substrate used in the present invention. It is a rear view.

FIG. 4 is an assembled perspective view of an example of a conventional connection structure between a flexible substrate and a reinforcing plate.

5 (a) is a rear view of the meter case of FIG. 4 in which a reinforcing plate and a flexible board are attached, as viewed from the back of the meter case, and FIG. 5 (b) is a corner of the reinforcing plate of FIG. 3 is a partially enlarged cross-sectional view showing a part of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bulb 2 Screw 3 LED 4 Connector pin 10 Flexible board 10A-10F hole 11 Valve mounting hole 12 Terminal part 13 LED mounting hole 14 Connector pin mounting hole 20 Reinforcement board 20A-20F Corner 23 LED mounting hole 24 Connector pin mounting hole 30 Meter case 31 Valve mounting hole 32 Connector groove 33 Light source insertion hole 34 Recess 40 Combination meter

Claims (1)

(57) [Scope of request for utility model registration] 1. A flexible substrate attached to a casing, and the flexible substrate is superposed on the flexible substrate.
Provided Te, a connection structure between the reinforcing plate you reinforce the flexible substrate, the portion of the flexible substrate corresponding to the corner portion is butted two edges of the reinforcing plate, a hole for receiving the corner A connection structure between a flexible substrate and a reinforcing plate, which is provided.